Literary usage of Subtunic

Below you will find example usage of this term as found in modern and/or classical literature:

1.The Archaeological Journal by British Archaeological Association (1911)"... a tunic belt and blanket worth 8^. and 2^ ells of cloth worth 13^, which he
sold at Osmotherley and was there arrested by the constable, and a subtunic ..."

2.Analytic Elocution: Containing Studies, Theoretical and Practical, of by James Edward Murdoch (1884)"They also possess the properties of vocality and prolongation, though in both
are inferior to the tonics, and are called subtunic sounds. ..."